Taiwanese swindler Mr. Giant (Teddy Robin) loses in a poker match against Hong Kong swindler Wong Seung-chin (Raymond Wong) and had become sworn enemies. Meanwhile, Wong's apprentice Snake Wai (Tony Leung) meets Susan (Lok Wai), a widow whom recently returned to Hong Kong from Singapore. Planning to con a big sum of money from her, Wai sets up a plan with his acquaintances Yam Sai-sung (Simon Yam) and Yip Mei-mei (Amy Yip). However, Susan turns out to be swindler as well. Unable to salvage a fortune from Susan, Wai, Sung and Mei become indebted to her. In desperation, Wai seeks help from his mentor who have won back all the debts they owed Susan. Susan then becomes acquainted with Wong and his apprentices and they work together to swindle profiteer Lung Cho-tin (Leung Tin). They able to swindle HK$2 million form Lung very easily. Not willing to be cheated, Lung hires Mr. Giant to battle against Wong.